Question

100 students appeared in 2 tests.60 students passed 1st test. 40 students
passed in the 2nd test. 20 students passed in both 1 and 2 tests. what is the
probability of the students who failed in both tests?; 100 students appeared in 2 tests.60 students passed 1st test. 40 students; passed in the 2nd test. 20 students passed in both 1 and 2 tests. what is the; probability of the students who failed in both tests?

Answer 1

students passed in both tests = 20
students failed in both tests = 100 - 20 = 80

probability of the students failed in both tests = 80/100 = 4/5

$<b>hope it helps$ ❣️✌️